Electromagnet.



`tro-magnetsv shall be UNITED sTATEs PATENT oEEIoE.

RAGNAR WIKANDER, 0F EJ'X'HWOOI). PARK, PENNSYLVANIA, ASSIGNOR TO WEST- & MANUFACTURING COMPANYL A CORPORATION l0F PENN- INGHOUSE" ELECTRIC SYLVANIA.

ELECTROMAGNET.

To all whom it may concern:

Be it known that I, RAGNAR W'IKANDE'R, a subject of the Kino ofSweden, and a resident of Edgewood zl'arlr, in 'the county of Allegheny and State of Pennsylvania, haveinvented a new and useful Im rovement in -Electromagnets, of which the ollowing is a specification. .X l

My' invention relates 'to',/'elflct1omagnets and to means for applying the powerexerted thereby.

One object of my invention ,isy to provide means whereby the power exerted by/elecreater' and vmor con-A stant than'has hereto ore been possi e.

Another object ofmy invention is/to prevent vibration of the operatedv member by 'reason of reversals of magnetismwhen thev magnet is energized by alternating current.

My invention is illustrated in the accompanying drawings, Figure l of which is a view, partially'in elevation and partially in section, of a'n electro-ma net constructeddn accordance.` therewith'.l 2 and 3 are similar Views of modifications of'my invention as appliedto the operation of electric switches. 1 Q

A magnet "windingv or coil, 1 is 'mounted within an-inclosing magnetizab'le casing 2, which also .forms-the stationary portion of the magnet core, the armatureporti'on 3 of whichfislocated within the opening of the' coil and 'is movable longitudinally therein. The armature 3 is pivotally connectedat 4 to the inner ends-of links 7 `and 8, the outer ends of which are respectively connected-to the inner endsrof toggle lever arms 11 and 12 and 13 and 14,.'t e outer ends of which are pivoted to the magnet4 casing 2. The

outer ends of the lever arms 12 and 14 are connected to ether by a resilient strip2l.l 'A rod 22, whic is here' intended to represent kthe piston rod ofk a valve, (not shown but which may be a movable member o any other mechanism, is provided, with ya nut or head 23 that is ad'uiustable von the upper threaded end 24 of the rod and is eng'ged by thea-resilient strip 21 tov effect operation ofl the member. The rod 22 is normally maintained v in its `uppermost position by ineans of a spring 25 and is moved* to its lowermost position by the resilient strip 21 when the winding 1 is energized and the armature 3 is raised, the inner ,ends oflinks Specicaton of Letters Patent.

7 and 8 being thereby raised, the toggle le- Patented Dec. 6, 1910.

Application inea August' 2, 41905. A serial No. 272,402. 1

ver armsll, 12 .and 13,14 being forced outwardly and the Aresilient strip 21 being forced downwardly by such action. All vibrations of the armature3, due toreversals of magnetism therein, which occur when the winding 1 is energized by alternating current, are absorbed in .the resilient istrip 21 and transmission 'thereof vto the operated member or rod A22 is thereby prevented, so that'tlie power Vexerted upon .andby the lmember may thus be maintained substantiallyl constant. E v In Fig. 2,l my inventi'on is shown as applied to theoperation of an electric switch,

the resilient strip 21' being replaced by va rigid1member 26 'which is-connected to the outer ends ofthe toggle lever arms 11 and 13 and carries a llaminated conducting bridge 27 the end faces of which are adapt ed to engage circuit terminals 30 and 31 when the magnet winding 1 is energized. The member. 26 carries also a bri'dfring piece 32, of higher' resistance than the laminated .y

"bridging pieceg27, `the ends of4 which are provlded withjterminal pieces 33 and 34 that are adapted :to engage stationary con- I tact -terminals'35 and 36. s These latter' parts are provided/for the rpurpose of increasing the resistance in` the circuitjnst prior 'to in terruptlon Athereof and'alsoin order that the arcs which are'formed 'upon openingy the switch ImaA occur between them' instead of between te end -fa'ces of the Ilaminated bridging pieces 27;, when the Switch is( closed,l terminall pieces and 34'are irstv 'brought-finto; engagement with V'terminal lpiecesv 35 andf, respectively,- and 'thenthe" ends lof the bridging 'piece l 271- are canse'd. to

I,engage 4terx'ni'nal pieces:v 30' 'and 31, respec-x tively.l The 'reverse'v operations 'occur 'upon' Adeenergizing'the` winding A1. 'l p In Fig. 3, switch members137 -and'38 have pivotal connection with the outer ends4 of,l

the toggle lever arms 11 and 13, respectively', and are 'pivotally connectedv together at" 39, a spring-40 being located between "their adacent'ends -for the purpose 'of open# ing the'goint between them when the switch bers 37 and 38 are provided with curved contact ieces 43 'and`144 which are krespectively a apted to engage corresponding stationary contact terminal pieces 45 and 46.

v1s open. The other ends of the switch mem- Upon closing the switch, by causing the winding l to be energized, the tips of the contact pieces 43 andv 44 are first brought into engagement with the tips of the contact pieces 45 and 46 and the terminal ieces are then rolled upon each other unti they occupy the positions shown in full lines, when the switch is completely closed. When the switch is opened, a reversal of the operation just described takes place and the are which is formed upon the final rupture f of the circuit occurs between the tips of the contact pieces. -v

By means of the arrangement of the levers and operating parts herein set forth, greater forces may be exerted by the magnet than if no such parts were employed, and the variations of the operated member are correspondingly decreased, the use of the resilient connectinor piece between the free ends of the toggle members further reducing the evil effects of vibrations.

While I have shown my invention as applied to the operation of 'certain devices, I desirerit to be understood that it may be applied `to the operation of any other devices and that the structure and arrangeL ment of parts may be varied considerab within limits,l Without `departing from its spirit. I claim as my invention: j 1. The combination with a movable arma- -ture and an actuating windin therefor, of

an operated member, two sets o tog le me bers, one end of one member 0f eac set being provided with a stationary pivot, a resilient connecting piece between the free ends of the other members and the operated member, and links havin pivotal connections to the armature am? to the joints of the to gle members.

2. 'lghe combination with a movable arma ture and an actuating winding therefor, of

an operated member, sets of toggle members, one end of one member of each set being provided with a stationary ivot, a resilient connecting piece between t efree ends of the other toggle members and the operated links having pivotal connecmembers.

l 3. The'combination with a magnetizable armature and a winding therefor, of a resilient4 ieee, tog le levers and links interposed etween t e ends of said resilient piece and the amature, and a member that is operated by said resilient piece.

4. The combination lwith a ma windin and an armature there or, of a pair o? toggle levers, a resilient member which connects together the free ends of said levers, connections lbetween the amature and the joints of the tog le levers,and a load member operated y the resilient member.

5. The combination with a magentizing coil, a movable core or amature therefor, and a load member, of a pair of toggle levers, a pair of links inter 'osed between said etizing core or armature and sai toggle levers, andl a sprin@r interposed between the-toggle levers and the load member.

6. The combination with a. magnetizing coil and a movable core or armature therefor, of a load member, a pair of t le le-. vers, links between the joints of sai evers and the core or amature, and a s ring in.- ter osed between the free ends of t 'e levers an the load member.

In testimony whereof, I have hereunto subscribed my name this 29th day of July RAGNAR WIKANDER'. Witnesses:

NannaA SKINNER, Bumm? HINEs. 

